Rotary crown ventilator



1934. A, s. WEINSTEIN ROTARY CROWN VENTILATOR Filed March 12, 1950 2 Sheets-Sheet l g] woe/whom 1 A63 file/21s fef/z 1934- A. s. WEINSTEIN ROTARY CROWN VENTILATOR Filed March 12, 1930 2 Sheets-Sheet 2 Patented Feb. 13, 1934 UNITED STATES rarer oFFIcE 8 Claims.

The present invention relates to devices adapted to be placed on the top of ventilating pipes, and relates more particularly to that type of such devices as are known as rotary ventilators.

Among the objects of the invention are the following:

(a) To provide a ventilator of the rotary type having a relatively high degree of efficiency; that is, one which will produce a very effective draft upwardly through the ventilator pipe with which it is associated.

(b) To provide a rotary ventilator having means to prevent undesirable foreign matter, such as rain and water mist, from penetrating thereinto.

(c) It is a general disadvantage of rotary ventilators that they will function to produce an up-draft only when the wind, which turns them, is blowing in a substantially horizontal direction, but not when they are subjected to upward or downward gusts of wind. It is therefore an object of this invention to overcome this general deficiency by providing a rotary ventilator adapted to act as a vacuum ventilator when it is not rotating, as when the wind is blowing upwardly or downwardly. In other words it is an object of this invention to provide a ventilator which will perform its intended function irrespective of the direction in which the wind may happen to blow.

(d) To provide improved means for rotatably mounting the ventilator.

(e) To provide a rotary ventilator having a plurality of means exposed to the wind currents whereby to secure rotation thereof with the least amount of wind force and with a minimum of strain upon the ventilator.

(f) To provide a ventilator having a plurality of complementary foul air exhausting means.

(9) To provide a ventilator of the rotary type having a revolving head formed in the shape of a crown so as to present a pleasing appearance to the eye.

(it) To provide a rotatable ventilator which shall be strong and durable.

These objects are attained in the embodiment of the present invention hereinafter disclosed, and consisting of the construction and novel combination and arrangement of parts fully described below, illustrated in the accompanying drawings and pointed. out in the claims hereunto appended.

In the drawings:

Figure 1 represents a View, partly in section and partly in elevation, of the entire ventilator;

Figure 2 is a plan view thereof;

Figure 3 is a View along line 3-3 of Figure 1, looking in the direction of the arrows;

Figure 4 is a sectional view through the gear casing, showing the gearing arrangement of the ventilator in some detail;

Figure 5 is a view of one of the foul air scoops,

(Cl. Sis-72) showing its relation to the remainder of the construction; and

Figures 6 and 7 are views of the said scoop, looking, respectively, in the directions indicated by lines 66 and 7-7 of Figure 5.

In the drawings, the ventilator constituting the present invention is represented as comprising two main parts, namely: a revolving head member, generally indicated by the reference character A, and a barrel-shaped base member, generally indicated by the reference character B.

The revolving or rotary head A is made up, primarily, of a substantially cylindrical sheet metal windshield member 1, and a pair of sheet metal cone-shaped members 2 and 3. These coneshaped members are attached to each other at their bases in any desired manner, as by soldering, weld ng, or riveting, and are fixedly mounted on the main rotatable spindle 4., as shown. A collar 5 fixed to the said spindle, and having an upwardly opening conical socket 6, acts as a lower abutment for the cones 2 and 3. A nut 7 keeps the head A securely in place upon the spindle.

Intermediate cones 2 and 3, and connecting them to the windshield 1, are a plurality ofsets of connecting means. Each set of connecting means consists of two substantially triangularlyshaped sheets of metal 8 and 9, and a scoop 10. Nine sets of such connecting means are shown as arranged in consecutive relation about the outer periphery of the cone 2.

Each member 9 is suitably attached-as by soldering-along one edge 11 thereof to the Junotion of the cones 2 and 3. Similarly, each memher 8 is attached at one edge 12 to the exterior of the cone 2 along a line extending from the apex of the latter to one of the vertices of member 9 adjacent the said junction of cones 2 and 3. Adjacent edges of the members 8 and 9 are joined together, as at 13, forming a pocket 14.

Between the edges 13 and the windshield 1, and attached to each, are disposed the sheet metal scoops 10. Each scoop 10 defines, together with the member 9 of an adjacent set of connecting means and with the adjacent portion of windshield 1, an opening or passage between the interior and the ext rior of the head A. The pockets l4 and scoops 10 have important functions which are set out in detail below.

On the exterior of the windshield i, there are securely attached a plurality of pocket-forming members 15, one opposite each set of connecting means 8, 2?, 10. The pockets formed by the members 15, which are preferably made of sheet metal, open in the same direction as do the pockets i l.

The spindle 4, upon which the head above-described is mounted, extends downwardly into the gear casing 16, which is supported in the base member 13. Preferably, this gear casing is filled with oil or other lubricant. The lower end of the spindle 4 rests rotatably upon the thrust bearing 17. The spindle may be further supported by radial ball bearings (not shown) disposed in cages or casings 18, in any desired manner.

Fixedly mounted upon the spindle and rotatable therewith is the gear 19. Loosely mounted upon the said spindle and disposed above the gear 19 is the smaller gear 20, preferably sup ported upon the upper bearing 18. Gear 28 is provided with an upwardly-extending collar 21 which protrudes upwardly through the top of the gear casing. To prevent oil from escaping upwardly along spindle 4, a felt washer 22 is placed between the said spindle and the contiguous surface of the collar 21.

A six-bladed suction fan 23 is securely mounted on the top of the collar 21, the outer ends of the blades being firmly held in place by the ringshaped wire 24.

Also disposed in the gear casing 16 is the countor-spindle 25, which fixedly carries the gears 26 and 2'7. As shown, gear 26 meshes with gear 19 of spindle 4, and gear 27 meshes with gear 20. Gears 19 and 27 are of substantially equal size, while gears 20 and 26 are of equal size but are somewhat less than half the size of the other two gears. It is thus seen that any rotation of the spindle 4 is transmitted to the fan 23 through the gears 19, 26, 27 and 20, and that for every revolution of the spindle 4 the fan will revolve about five times, adding greatly to the effectiveness of the latter.

Coming now to the construction of the base member B, it is seen (Figure 1) that this consists of a stationary barrel member 28 adapted to be securely mounted upon the outlet of the ventilating pipe with which the ventilator is designed to coact. Intermediate the ends of the barrel 28 are provided braces 29, forming the supporting means for the gear casing 16.

Spaced from the top of the barrel 28 and supported thereon by straps 30, is the open frustoconical baffle ring 31. The upper end of the barrel and the baffle ring 31 are adapted to extend into the lower open end of the head A so that, in operative relationship, the top of the bafile ring is in proximity to the lower ends of the scoops 10.

In operation, horizontal or substantially horizontal gusts of wind impinge upon the interiors of the pockets 14 and 15 and force the head A and spindle 4 to rotate. It is important that the pockets 14 and 15 open in the same direction as this forms double the ordinary amount of surface exposed to the wind currents, and makes the device ultra-sensitive to wind pressure and operable with a minimum of strain.

The least rotation of the head is magnified four or five times in its transmission through the gear casing to the suction fan 23. during normal rotation of the head, creates a relatively powerful suction of foul air upwardly from the ventilator pipe below it. The foul air is hurled upwardly and is caught up by the scoops 16 and quickly exhausted to the exterior of the head A, thus avoiding possible banking up of the foul air inside the head. The scoops 10 are also elTective to act as an air-suction means by themselves in case the fan 23 should be broken, or for some other reason should fail to operate. It is thus seen that the present construction provides a pair of structurally distinct but functionally complementary suction means,capahle or" performing their intended functions individually or in unison.

It is important that the fan member 23 should e mounted to rotate in the same direction as the head A, thus avoiding the formation of counter-currents which would detract from the efficiency of the device.

The top of the windshield 1 is shown as serrated at 32, to add to the appearance of the ventilator. For the same reason, the members 15 are formed so as to give to the head A, whether rotating or standing still, the general shape of a crown.

As has been indicated above, it is an important feature of the present construction to enable the ventilator to draw foul air out of the ventilator pipe, even though the head be not rotating and the suction fan, consequently, at rest. For this purpose, it is only necessary that the ventilator be exposed to generally upwardly or doumwardly directed blasts of air.

Downwardly directed blasts of air or Wind will end to enter the interior of the ventilator through the openings at the scoops 10 and will strike the outer surface of the frusto-conical ing 31. In attempting to pass between the said user surface and the interior of the windshield it is obvious from an inspection of Figure 1 hat the air will be compressed, since the disance between the windshield 1 and ring 31 proressively decreases in a downward direction. his compression of the air and its sudden expansion as it passes by the lower edge of the ring 31 cause it to produce a suction or vacuum effect back of it which is sufficient to draw the foul air upwardly from the ventilator pipe.

A similar action occurs when the wind blows upwardly through applicants novel ventilator. Air, passing into the lower wide end of the ring 31, is compressed in its upward travel therethrough between the interior of the ring and the cone 3, and then suddenly expands again as it passes by the upper edge thereof. This tends to produce a sucking or vacuum efifect back of the air which operates to exhaust some of the foul air from the ventilator pipe.

The ring 31 also acts as a baille to prevent any foreign matter, such as rain water, which may enter the top of the ventilator, from penetrating into the base B and ventilator pipe. The water drips onto the outer surface of the ring 31 and is deflected thereby to the exterior of the base B.

In accordance with the patent statutes, I have described the principles and particular construction of the elements and combination of the parts of my rotary ventilator, and while I have illustrated a particular formation, I desire to have it understood that the same is only illustrative of a means of carrying out my invention in one form and that obvious changes may be made by anyone skilled in the art within the scope of the following claims without departing from the spirit of my invention.

I claim:

1. In a rotary ventilator of the crown type, the combination with a main spindle, of a plurality of cone-shaped members mounted on said spindle, a substantially cylindrical member spaced from and surrounding said cone-shaped members, and means for connecting said cylindrical member to said cone-shaped members, said connecting means including a plurality of foul air exhausting scoops and a plurality of wind pockets.

2. A ventilator comprising a rotatable crownshaped head portion and a base portion disposed in telescopic relation to each other, said base portion comprising a barrel member and a frusto-conical baffle ring of greater diameter than said barrel member mounted thereabove, said head portion comprising a plurality of cones disposed one above the other, the lower of said cones extending into said baffle ring and adapted to coact with said ring to compress air currents moving upwardly therebetween, and said head portion comprising an imperforated band telescoping said barrel member and having wind pockets on the exterior thereof, said head portion being provided with openings in the top thereof.

3. In a ventilator, the combination of a spindle, a rotary head fixed on said spindle, said head comprising a plurality of cones, a windshield encircling but spaced from said cones, and a plurality of sets of connecting means disposed between said windshield and said cones, each set of said connecting means including a wind pocket and a foul air scoop extending into the interior of the head.

4. The combination, in a ventilator adapted to be mounted upon a ventilator pipe, of rotary means for exhausting foul air from said pipe when tl'.e Ventilatoris exposed to substantially horizontally-directed wind currents, a baffle ring mounted above said pipe, and said rotary means comprising a plurality of deflecting means disposed on opposite sides of said baflle ring and adapted, in combination with the latter, to effect exhaustion of the foul air when the ventilator is exposed to substantially vertically-directed wind currents.

5. In a ventilator, a cylindrical barrel portion adapted to be fixed upon a ventilator pipe, rotary means including a suction fan for sucking foul air from the said pipe when the ventilator is exposed to substantially horizontally-directed wind currents, said rotary means comprising an imperiorate substantially cylindrical band telescoping said barrel portion, and additional means comprising a frusto-conical baflle ring mounted upon said barrel portion and inverted conical deflecting means mounted upon said rotary means for effecting the suction of foul air from the pipe when the ventilator is exposed to substantially-vertically directed wind currents.

6. In a rotary ventilator, a head member comprising a pair of cones and a windshield member encircling but spaced from said cones, wind pockets mounted upon the exterior of said windshield member, and auxiliary wind pockets and foul air scoops mounted between said cones and windshield member, and defining, in combination with the latter, a plurality of passages interconnecting the interior and exterior of the ventilator.

7. In a ventilator comprising a rotatable head portion and a base portion, said head portion being provided with outlet openings and mounted above said base portion, means mounted in said base portion and adapted to evacuate air from beneath the ventilator, and additional air-evacuating means integral with said head portion and coacting means, including a substantially cylindrical imperforate band on said head portion and a barrel member on said base portion, said band and barrel member being disposed in mutually telescoping relation, for effecting suction when the ventilator is exposed to substantially vertically directed wind currents.

8. In a ventilator of the class described, a main spindle, a pair of cone-shaped members mounted on said spindle, a substantially cylindrical member surrounding said cone-shaped members in spaced relation thereto, a plurality of pairs of triangular sheet metal members secured to one of said cone-shaped members and forming with said cone-shaped member wind pockets, and scoop members connecting said windshield and sheet metal members.

ABRAHAM S. WEINSTEIN. 

